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September Weather in Haynesville, United States

Last updated: June 24, 2025

In Haynesville, United States, the average temperature in September hovers around 26°C (78°F). During this time, temperatures can fluctuate significantly, dipping to a minimum of 11°C (52°F) and peaking at a scorching 39°C (103°F). Expect about 94 mm (3.7 in) of precipitation over approximately 7 days, accompanied by an average humidity level of 63%. Stay prepared for a mix of weather!

September Temperature in Haynesville

In September in Haynesville, the average temperature is 26°C (78°F). Maximums can reach up to 39°C (103°F), while minimums can drop as low as 11°C (52°F). Be sure to pack for both warm days and cooler nights when you travel to Haynesville this month.

September Weather in Haynesville: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Haynesville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Haynesville, September typically has an average temperature of 26°C (78°F), with highs reaching up to 39°C (103°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec475060647481838278675551
Data source: Temperature data for Haynesville generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Haynesville

In Haynesville in September, the precipitation amount is 94 mm (3.7 in) over a span of 7 days.

September Precipitation Trends in Haynesville

The chart displays monthly precipitation patterns in Haynesville, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Haynesville, September typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec110155142193136117811049411167131
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Haynesville

In Haynesville in September humidity is 63%. With an average temperature of 26°C (78°F), this humidity feels like a warm, tropical embrace, making outdoor activities pleasantly refreshing yet slightly sticky, perfect for leisurely strolls and beachside adventures.

September Average Humidity in Haynesville

This chart illustrates the average monthly humidity levels in Haynesville, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Haynesville is approximately 63%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%78%79%81%77%72%65%63%70%82%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Haynesville

In Haynesville in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Haynesville.

Maximum UV Index Levels in Haynesville for September

The chart shows the monthly maximum UV Index (UVI) for Haynesville in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Haynesville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478111112111110864
Data source: Haynesville September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Haynesville Compares to Other Months

Weather in Haynesville varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Haynesville, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Haynesville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)110 mm (4.3 inches)82%moderate
February Weather10°C (51°F)155 mm (6.1 inches)80%high
March Weather16°C (60°F)142 mm (5.6 inches)78%very high
April Weather18°C (65°F)193 mm (7.6 inches)79%extreme
May Weather23°C (74°F)136 mm (5.3 inches)81%extreme
June Weather27°C (81°F)117 mm (4.6 inches)77%extreme
July Weather28°C (83°F)81 mm (3.2 inches)72%extreme
August Weather28°C (83°F)104 mm (4.1 inches)65%extreme
September Weather26°C (78°F)94 mm (3.7 inches)63%very high
October Weather19°C (67°F)111 mm (4.4 inches)70%very high
November Weather13°C (55°F)67 mm (2.6 inches)82%high
December Weather11°C (52°F)131 mm (5.2 inches)88%moderate

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